Primary invasive micropapillary carcinoma of the colon: case report and review of the literature.

Invasive micropapillary carcinoma is associated with frequent lymph node metastases and adverse clinical outcome. It has been reported in breast, urinary bladder, lung and the parotid gland, but very rarely in the colon. We report a new case in a 63-year-old man involving the colon, and discuss the clinicopathologic features of this rare and particularly aggressive tumour.